Tested some custom resources with a test scene.

ResourceTest.tscn

@@ -0,0 +1,46 @@
+[gd_scene format=3 uid="uid://cbn8gkhh54biw"]
+
+[ext_resource type="Script" uid="uid://xjow2vrn307m" path="res://test_enemy.gd" id="1_wrqmu"]
+[ext_resource type="Script" uid="uid://0nsrno5ksdeh" path="res://scripts/ExampleResource.gd" id="2_2fskf"]
+[ext_resource type="Resource" uid="uid://cy58t3vbkogtu" path="res://resources/example_resource1.tres" id="2_4vrue"]
+[ext_resource type="Texture2D" uid="uid://dy743vehs0t1t" path="res://icon.svg" id="3_nascw"]
+
+[sub_resource type="Resource" id="Resource_nascw"]
+script = ExtResource("2_2fskf")
+speed = 5.0
+metadata/_custom_type_script = "uid://0nsrno5ksdeh"
+
+[sub_resource type="RectangleShape2D" id="RectangleShape2D_4vrue"]
+
+[node name="ResourceTest" type="Node2D" unique_id=1938241335]
+
+[node name="TestEnemy" type="Area2D" parent="." unique_id=197600973]
+position = Vector2(177, 252)
+script = ExtResource("1_wrqmu")
+example_resource = SubResource("Resource_nascw")
+
+[node name="Sprite2D" type="Sprite2D" parent="TestEnemy" unique_id=392517985]
+position = Vector2(19, -111)
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="TestEnemy" unique_id=1888418400]
+shape = SubResource("RectangleShape2D_4vrue")
+
+[node name="TestEnemy2a" type="Area2D" parent="." unique_id=681188134]
+position = Vector2(60, 166)
+script = ExtResource("1_wrqmu")
+example_resource = ExtResource("2_4vrue")
+
+[node name="Sprite2D" type="Sprite2D" parent="TestEnemy2a" unique_id=479189583]
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="TestEnemy2a" unique_id=1055590466]
+shape = SubResource("RectangleShape2D_4vrue")
+
+[node name="TestEnemy2b" type="Area2D" parent="." unique_id=148383400]
+position = Vector2(176, 93)
+script = ExtResource("1_wrqmu")
+example_resource = ExtResource("2_4vrue")
+
+[node name="Sprite2D" type="Sprite2D" parent="TestEnemy2b" unique_id=2119219440]
+
+[node name="CollisionShape2D" type="CollisionShape2D" parent="TestEnemy2b" unique_id=656950543]
+shape = SubResource("RectangleShape2D_4vrue")

resources/bullet_stats.tres

@@ -0,0 +1,7 @@
+[gd_resource type="Resource" script_class="BulletResource" format=3 uid="uid://ds8pfhnj8c303"]
+
+[ext_resource type="Script" uid="uid://64l0xhnsdh7x" path="res://scripts/bullet_stats.gd" id="1_c83q5"]
+
+[resource]
+script = ExtResource("1_c83q5")
+metadata/_custom_type_script = "uid://64l0xhnsdh7x"

resources/example_resource1.tres

@@ -0,0 +1,10 @@
+[gd_resource type="Resource" script_class="ExampleResource" format=3 uid="uid://cy58t3vbkogtu"]
+
+[ext_resource type="Script" uid="uid://0nsrno5ksdeh" path="res://scripts/ExampleResource.gd" id="1_aogvj"]
+[ext_resource type="Texture2D" uid="uid://deyu1prtitqcp" path="res://_graphics/Mini Pixel Pack 3/Enemies/Bon_Bon (16 x 16).png" id="2_xrkta"]
+
+[resource]
+script = ExtResource("1_aogvj")
+speed = 5.0
+sprite = ExtResource("2_xrkta")
+metadata/_custom_type_script = "uid://0nsrno5ksdeh"

scenes/bullet.gd

@@ -1,8 +1,11 @@
 extends Area2D
 
 @onready var bullet = $Bullet
+#@export var speed = -250
+@export var stats: Resource
+
+#var bullet_data = load("res://resources/bullet_resource.tres")
 
-@export var speed = -250
 var shader_active = false
 var pause = false
 var target = null
@@ -20,7 +23,7 @@ func start(pos):
 
 func _process(delta):
     if pause == true: return
-    position.y += speed * delta
+    position.y += stats.speed * delta
     
     #if target:
       #var direction = (target.position - position).normalized()

scenes/bullet.tscn

@@ -2,6 +2,7 @@
 
 [ext_resource type="Script" uid="uid://c6oorp45vpqpc" path="res://scenes/bullet.gd" id="1_v8qja"]
 [ext_resource type="Shader" uid="uid://dfywtah53il1m" path="res://shaders/player_hit.gdshader" id="2_eoqba"]
+[ext_resource type="Script" uid="uid://64l0xhnsdh7x" path="res://scripts/bullet_stats.gd" id="2_tamys"]
 [ext_resource type="Texture2D" uid="uid://bnc77g20gb20h" path="res://sprites/david-head.png" id="2_y25gk"]
 [ext_resource type="Texture2D" uid="uid://dwd6pycecukqb" path="res://sprites/david-headshot.png" id="3_l5glv"]
 [ext_resource type="AudioStream" uid="uid://cy01lrl2la6bn" path="res://sounds/splat_alt.wav" id="5_qncy5"]
@@ -20,6 +21,7 @@ size = Vector2(12, 11)
 [node name="Bullet" type="Area2D" unique_id=1850257077]
 z_index = -1
 script = ExtResource("1_v8qja")
+stats = ExtResource("2_tamys")
 
 [node name="Sprite2D" type="Sprite2D" parent="." unique_id=29933687]
 material = SubResource("ShaderMaterial_qncy5")

scenes/enemy_bullet.gd

@@ -1,15 +1,17 @@
 extends Area2D
 
 
+#bullet_data: BulletResource
+var bullet_data = load("res://resources/bullet_resource.tres")
 
+#@export var speed = 150
 
-@export var speed = 150
 
 func start(pos):
     position = pos
 
 func _process(delta):
-    position.y += speed * delta
+    position.y += bullet_data.speed * delta
 
 func _on_visible_on_screen_notifier_2d_screen_exited():
     queue_free()

scripts/EnemyResource.gd

@@ -0,0 +1,11 @@
+extends Resource
+class_name EnemyResource
+
+var primary_enemy_bullet: BulletResource = preload("res://scripts/BulletResource.gd")
+var exploding: bool
+
+@export var enemy_type: String
+@export var health: int
+@export var speed: int
+var start_pos: float 
+@export var tween_speed: float

scripts/EnemyResource.gd.uid

@@ -0,0 +1 @@
+uid://dxmlb4jyoucud

scripts/ExampleResource.gd

@@ -0,0 +1,7 @@
+extends Resource
+class_name ExampleResource
+
+@export var type: String = "Example"
+@export var speed: float = 10.0
+@export var sprite: Texture2D = preload("res://icon.svg")
+@export var new_type: bool = false

scripts/ExampleResource.gd.uid

@@ -0,0 +1 @@
+uid://0nsrno5ksdeh

scripts/bullet_stats.gd

@@ -0,0 +1,15 @@
+class_name BulletStats
+extends Resource
+
+@export var bullet_type: String
+@export var bullet: String
+
+@export var damage: int
+@export var speed: int 
+
+
+func _init(bullet_type:String = "normal", bullet:String = "res://resources/bullet_resource.tres", damage:int = 1, speed:int = 150):
+  self.bullet_type = bullet_type
+  self.bullet = bullet
+  self.damage = damage
+  self.speed = speed

scripts/bullet_stats.gd.uid

@@ -0,0 +1 @@
+uid://64l0xhnsdh7x

test_enemy.gd

@@ -0,0 +1,14 @@
+extends Area2D
+
+@export var example_resource: ExampleResource
+var speed: float = 0
+var type: String = "null"
+
+func _ready() -> void:
+  #resource_sprite.texture = example_resource.sprite
+  $Sprite2D.texture = example_resource.sprite
+  #$Sprite2D/Sprite2D.texture = example_resource.sprite
+  speed = example_resource.speed
+  type = example_resource.type
+
+  

test_enemy.gd.uid

@@ -0,0 +1 @@
+uid://xjow2vrn307m